I'll draw you a pic.
Beginning of the experiment, 1 layer spawned:
W----------------------
D *
*
*
*
*
A -------------------------------------->
VA bit later, 2 layers spawned:
W----------------------
D **
**
**
**
**
A -------------------------------------->
V3 layers spawned:
W----------------------
D ***
***
***
***
***
A -------------------------------------->
VThis will continue, until the first row has reached "D". At that point the cloud layer is fully spawned with all 128 rows. The time to do this depends, of course, on the distance "W-D" and the layer speed.
Once the first row reaches point "V", the rows start to vanish one by one. The first row vanishes first. As the last row reaches V, the time starts ticking (don't have the editor here, don't remember the name), before the layer spawns again from the beginning.
I hope this explanation was a bit clearer. Like I said, set the speed to 1000 and you'll see everything in fast forward.
Camo